Thứ năm, 14/11/2024
IMG-LOGO

Câu hỏi:

26/06/2024 150

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions

       Archimedes’s Principle is a law of physics that states that when an object is totally or partially immersed in a fluid, it experiences an upthrust equal to the weight of the fluid displaced. The principle is most frequently applied to the behaviour of objects in water, and helps to explain floating and sinking, and why objects seem lighter in water. It also applies to balloons.

        The key word in the principle is “upthrust”, which refers to the force acting upward to reduce the apparent weight of the object when it is under water. If, for example, a metal block with a volume of 100 cm3  is dipped in water, it displaces an equal volume of water, which has a weight of approximately 1 N (3.5 oz). The block therefore seems to weigh about 1 N less.

        An object will float if its average density is less than that of water. If it is totally submerged, the weight of the water it displaces (and hence the upthrust on it) is greater than its own weight, and it is forced upward and out of water, until the weight if water displaced by submerged part is exactly equal to the weight of the floating object. Thus a block of wood with a density six tenths that of water will float with six tenths of its volume under water, since at that point the weight of fluid displaced is the same as the blocks’s own weight. If a dense material is made into a suitable shape, it will float because of Archimedes’s principle. A ship floats, whereas a block of iron of the same mass sinks.

        It is also because of Archimedes’s principle that ships float lower in the water when they are heavily loaded (more water must be displaced to give the necessary upthrust). In addition, they cannot be so heavily loaded if they are to sail in fresh water as they can if they are to sail in the sea, since fresh water is less dense than sea water, and so more water must be displaced to give the necessary upthrust. This means the ship is lower in the water, which can be dangerous in rough weather.

         From “Archimedes’s Principle”, MicrosoftÒ Student 2008[DVD]. Microsoft Corporation, 2007.

The word “volume” in the passage refers to ______.

A. loudness

B. quantity

Đáp án chính xác

C. frequency

D.  lenght

Trả lời:

verified Giải bởi Vietjack

Đáp án B

B. quantity: từ “quantity” có nghĩa là “số lượng”.

Cụm từ “a volume of water” trong đoạn hai có nghĩa là “một lượng nước”.

Câu A “loudness” có nghĩa là “độ lớn của âm thanh”.

Câu C “frequency” có nghĩa là “tần suất”.

Câu D “length” có nghĩa là “độ dài”.

Câu trả lời này có hữu ích không?

0

CÂU HỎI HOT CÙNG CHỦ ĐỀ

Câu 1:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

I know you are upset about breaking up with Tom, but there are plenty more               

Xem đáp án » 18/06/2021 9,138

Câu 2:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

I'll have to go to the funeral of Ms. Jane, a             of mine

Xem đáp án » 18/06/2021 5,951

Câu 3:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to each of the following questions.

David was narrowly defeated and blew his own chance of becoming a champion.

Xem đáp án » 18/06/2021 3,854

Câu 4:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Matthew's hands were covered in oil because he                his bike

Xem đáp án » 18/06/2021 2,337

Câu 5:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

We found some real                 at the market

Xem đáp án » 18/06/2021 2,001

Câu 6:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

I'm sorry you've decided not to go with us on the river trip, but               you change your mind, there will still be enough room on the boat for you

Xem đáp án » 18/06/2021 1,979

Câu 7:

Mark the letter A, B, G or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

It gives out light, but not heat and so is safe to use near inflammable liquids

Xem đáp án » 18/06/2021 1,863

Câu 8:

Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges

- John: "I can't see the stage very well from here." - Jack: "             "

Xem đáp án » 18/06/2021 1,668

Câu 9:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

The at the football match cheered their team on.

Xem đáp án » 18/06/2021 1,427

Câu 10:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

It was so foggy that the driver couldn't          the traffic signs

Xem đáp án » 18/06/2021 1,272

Câu 11:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

___________________with my previous job, I would have won a higher promotion and I        in this unfortunate position now

Xem đáp án » 18/06/2021 1,002

Câu 12:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

It's no good pretending; you've got to                    reality

Xem đáp án » 18/06/2021 974

Câu 13:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is CLOSEST in meaning to each of the following questions.

If you had stuck to what we originally agreed on, everything would have been fine.

Xem đáp án » 18/06/2021 887

Câu 14:

Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges

Peter: "I've been awarded a scholarship to study in America."  ~ Kate: "Uh, really?         "

Xem đáp án » 18/06/2021 728

Câu 15:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Wood that has been specially treated is          regular wood

Xem đáp án » 18/06/2021 703

Câu hỏi mới nhất

Xem thêm »
Xem thêm »